Hello Frank, or anyone else affected, Accepted dpkg into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/dpkg/1.22.6ubuntu6.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-noble. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2064538 Title: Revert back frame pointers for s390x (remove -fno-omit-frame-pointer but use -mbackchain) Status in Ubuntu on IBM z Systems: New Status in dpkg package in Ubuntu: Fix Released Status in glibc package in Ubuntu: New Status in linux package in Ubuntu: New Status in dpkg source package in Noble: Fix Committed Status in glibc source package in Noble: New Status in linux source package in Noble: New Status in dpkg source package in Oracular: Fix Released Status in glibc source package in Oracular: New Status in linux source package in Oracular: New Bug description: The preferred way of doing stack unwinding on Linux on Z is via dwarf call frame information. In absence of a dwarf unwinder (as in the Linux kernel) a stack chain can be maintained at runtime in addition to the dwarf unwinding information. This allows for simple backtrace implementations, but imposes a small runtime overhead. For this to work, all code that might be part of backtrace must be built with the -mbackchain GCC option. The -fno-omit-framepointer switch is neither necessary nor helpful in this context. Having a (soft/simulated) frame pointer does not improve backtraces at all on IBM Z. However, forcing a frame pointer via the -fno-omit-frame-pointer option negatively affects performance for multiple reasons: extra prologue/epilogue overhead and fewer shrink-wrapping opportunities. Given -fno-omit-frame-pointer does not provide any improvements (backtraces or otherwise) and only reduces performance, -fno-omit-frame-pointers should not be used on IBM Z. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2064538/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
